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Double Row Super-Precision Cylindrical Roller Bearings NNU 4980 BK/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4980 BK/SPW33

The NNU 4980 BK/SPW33 is a double-row cylindrical roller bearing with a 400mm tapered bore and 540mm outer diameter, built for combined loads. It handles dynamic radial loads up to 330,750 lbf and operates smoothly at speeds up to 2000 RPM.

Made from durable chrome steel, its open design allows flexible lubrication with grease or oil. The double-row construction provides stability, while the tapered bore ensures secure fitting.

This bearing suits heavy-duty applications like industrial gearboxes or large machinery. It works in temperatures from -30°C to 110°C and complies with RoHS and REACH standards.

Weighing 87.5kg, it’s robust yet designed for precision. The 5.5mm axial displacement tolerance offers flexibility in demanding setups. Interchangeable with SKF models for easy replacement.

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Product Parameters

  • Part Number NNU 4980 BK/SPW33
  • Size 400 mm x 540 mm x 140 mm
  • Brand TFL
  • Interchangeable brand SKF
  • System of Measurement Metric
  • Roller Bearing Type Cylindrical
  • Bore Type Taper 1:12
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Bore Dia 400 mm
  • Bore Dia Tolerance 0 to +0.040mm
  • Outer Dia 540 mm
  • Outer Dia Tolerance -0.028mm to 0
  • Width 140 mm
  • Width Tolerance -0.40mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 4 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 2.5 mm
  • Permissible Axial Displacement(max.) 5.5 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 330750 lbf
  • Static Radial Load 855000 lbf
  • Max Speed 2000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 87.5 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 9 mm
  • Shoulder Dia Outer Ring 490.8 mm
  • Raceway Diameter Inner Ring 446 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4980 BK/SPW33 dimension drawing
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Features

Performance Features of NNU 4980 BK/SPW33 Bearing

NNU 4980 BK/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 330750 lbf, ensuring reliable performance in heavy-duty applications.

The double-row cylindrical design enhances stability and load distribution, reducing wear over time.
With a maximum speed of 2000 rpm, it balances high performance and durability.

NNU 4980 BK/SPW33 Bearing operates efficiently in temperatures ranging from -30° to 110°C.
Its open design allows for flexible lubrication options, including grease or oil.

The tapered bore design simplifies installation and ensures secure fitting.
This bearing is ideal for precision tasks requiring high load capacity and smooth operation.

Application

Industrial Uses of NNU 4980 BK/SPW33 Bearing
NNU 4980 BK/SPW33 Bearing is commonly used in heavy industrial machinery, such as large lathes and rolling mills, where its double-row design handles high radial and axial loads. The tapered bore ensures a secure fit, reducing slippage during operation.

In wind turbine applications, NNU 4980 BK/SPW33 Bearing supports the main shaft, providing stability under varying wind conditions. Its chrome steel construction offers durability in harsh outdoor environments.

For paper manufacturing equipment, NNU 4980 BK/SPW33 Bearing’s high dynamic load capacity ensures smooth operation in high-speed rollers. The open seal design allows for easy lubrication, extending service life.

What Makes NNU 4980 BK/SPW33 Bearing a Preferred Choice?
NNU 4980 BK/SPW33 Bearing is ideal for machine tool spindles, where precision and rigidity are critical. Its combined load capability makes it versatile for complex machining tasks.

In steel production, NNU 4980 BK/SPW33 Bearing withstands extreme loads and temperatures, ensuring reliable performance. The grease or oil lubrication options provide flexibility for different operating conditions.

Built for Heavy-Duty Use: NNU 4980 BK/SPW33 Bearing
NNU 4980 BK/SPW33 Bearing excels in mining equipment, handling heavy loads and abrasive conditions. The large bore diameter accommodates robust shafts commonly used in this industry.

For marine propulsion systems, NNU 4980 BK/SPW33 Bearing’s corrosion-resistant materials and high load capacity ensure long-term reliability. Its tapered bore simplifies installation and maintenance.

Automotive vs Aerospace: Applications of NNU 4980 BK/SPW33 Bearing
In automotive testing rigs, NNU 4980 BK/SPW33 Bearing provides precise load handling for durability testing. Its high-speed capability suits dynamic performance evaluations.

For aerospace ground support equipment, NNU 4980 BK/SPW33 Bearing’s precision ensures accurate alignment during aircraft maintenance. The combined load design accommodates complex force scenarios.

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